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(No Model.)

E. G. JOHNSON. GOVERNOR PoR STEAM PUMPS.

Patented Dec. 22, 1891.-

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STATES PATENT OFFICE.

EDW'ARD C. JOHNSON, OF KEOKUK, IOWA, ASSIGNOR TO 'TERESA M.

JOHNSON, OF SAME PLACE.

GOVERNOR FOR STEAM-PUMPS.

SPECIFICATION forming part of Letters Patent No. 465,477, dated December22, 1891. Application ned raum 13,1891. serai No. 377,619. (No man.)

.To all whom it may concern-.-

Be it known that I, EDWARD O. JOHNSON, residing at Keokuk, in the countyof Lee and State of Iowa, have invented certain new and usefulImprovements in Governors for Steam- Pumps, of which the following is aspecification, reference being had therein to the accompanying drawing.l

This invention relates to governors for steam-pumps in which thewater-pressure from the pump is made to regulate the supply of steam tothe engine which drives the pump.

The object of the invention is to regulate the speed or power of thepump, so that it shall conform to the requirements of the desiredservice.

The figure of the drawing is a central vertical section of asteam-supply valve and governor connected thereto, some parts of thedevice being shown in elevation, as apparent.

The numeral 1 indicates the body of the steam-supply or throttle-valve.

2 denotes the inlet-passage, and 3 the passage leading toward the enginewhich drives the pump.

The slide-valve is shown as seated in the bushings 4 5, inside the cup40. This slidevalve consists of askeleton cylindercomposed of disks ofplates 6, 7, and 8, connected by longitudinal bars 9. When the slidingplug is lifted, so that the disk 7 is in the bushing 5, disk 8 will bein the bushing 4, and the passage for steam will be closed. So when theslide is dropped until plate 6 is in the bushing 5, plate 7 will be inthe bushing 4, and the passage is closed; but in the intermediateposition shown the passages are open through the skeleton body of theslide or plug.

l The valve plug or slide is moved in its seat by means of the stem 10,which passes through stuffing-box 11. This valve is old and wellknown,and other valves having similar functions will serve the same purpose.The

valve-spindle has a perforated hub 12 or other usual connection to thecontrolling-lever 13, which is pivoted to standard 14 in usual manner.The governor-cylinder 15 has a piston 16, of usual construction, and thespindle 17 rests on this piston and serves as a follower therefor. Thelever 13 is connected to this spindle or rod 17, and is thus raised orlowered with the movement of the piston 16, and by its movement opens orcloses the steampassage according to the position of piston 16. Theweight 2O serves to hold the lever down until raised by the pistonmovement. Water from the delivery-pipe of the pump enters a side pipe2l, and flows into the cylinder 15, unless it is permitted to escape bythe side passage 22, which is controlled by cock 23. The cock 23 may beturned soY as to permit nearly all the water from pipe 21 to pass outand run to waste. It will be understood that konly a small quantity ofwater enters pipe piston moves down, which causes the valve to openagain. as sometimes happens, either by failure of water-supply or byaccident to the pump, the pressure in cylinder 1-5 would fall and thepiston would move down from the central or open position shown in thefigure. The stop 26 under the lever 13 will support the lever 13 whenthe steam-Valve is in its lower closed position. In such position theengine will be stopped; but the stoppage will be gradual, owing to theslow escape of water from the cylinder 15 through small passage 25. Whenthus stopped, the engine can only be started again by raising the lever13 and holding the steam-valve open until pressure has accumulated incylinder 15.

To prevent the entire stoppage of the engine, a movable piece 28, (shownas a sorew,) may be interposed between the lever 13 and the rest 26. Bylifting this piecea little way the governor will be so set that on afailure of pressure in cylinder 15 the steam-supply will be almost cut0E; buta small steam-supply will pass to the engine to keep the enginemoving. This arrangement is very desirable where the water-supply isintermitting, as often happens when the supply is from a well or spring.

Instead of or in addition to Weight 26, a

Should the pump fail to draw,

Spring, as 30, may be applied to bear on the lever 13, so that theresistance to the raising of lever 13 increases gradually as the pist0nrises. Of course the location of the spring is not material, and thesame result may be reached by the application of a series of Weights, ora spring around spindle 17, or other means.

This invention is an improvement on my patented device, No. 429,570, ofJune 3, 1890. The general principle is much the same; but the stop andadjustable rest for the valve-lever and the reduced orifice leading tothe cylinder are improvements. In the present device connection is madeto a different style of Valve, and the construction is changed inseveral particulars,

I do not claim, broadly, any of the separate elements contained in thisdevice, as cylinders, pistons, levers, valves, and pipes are old andWell known. Nevertheless these elements arranged as shown and described,produce a more simple, compact, and efficient governor for steam -pumpsthan any other with which I am familiar What I claim is- 1. Thecombination, with the slide-valve of a ,steam-engine, and theWater-supply pipe leading from the pump driven by said engine, of aWater-cylinder and piston therein, a lever controlled by said piston andcontrolling thesteam-valve as aforesaid, and a stop in the line ofmovement of said lever, said stop operating to retain the steam-valve inclosed position when the pressure falls in the Watercylinder below agiven minimum, substantially as described.

2. The combination, With the steam-valve of an engine, and theWater-supply pipe leading from the pump driven by said engine, of aWater-cylinder and piston therein, and a lever controlled by said pistonand controlling the steam-valve, an adjustable piece which determinesthe amount of movement of the lever on reduction of pressure in thecylinder, and a leak or by-passage controlled by a cock and acting as aregulator to the Waterpressure in the cylinder, substantially asdescribed.

In testimony whereof l affix my signature in presence of two Witnesses.

EDWARD C. JOHNSON. VitneSSeS:

W. A. BARTLETT, T. W. JOHNSON.

